Tractor transmission



June 19, 1923.

f G. J. ZIEGLER TRACTOR TRANSMISSION File-d dan; 1e,

1922 1 5 sheets-sheet' 1 June 19, 1923..

G. J. ZIEGLER TRACTOR TRANSMISSION 5 sheets-sham?4 Filed Jan. 16, 1922 MW' l mwhwww mi Tw/M e. W .Mwahwa n 0 M, .NWN

June 19, 1923.

l G. J. ZIEGLER TRACTOR TRANSMISSION Filed Jan. 16 1922 5 Shee'ts-Sheet 5 hh v,

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June 19, 1923.

G. J. .ZIEG LER TRACTOR TRANSMISSION 5 Sheets-Sheet 4 Filed Jan. 16. l1922 June 19, 1923. 1,459,491

G. J. ZIEGLER TRACTOR TRANSMI SS ION Filed Jan. 1e, 1922 5 sheets-sheet@ eo Z 'elyl e1;

@F9 ,1 JAM M' /Zg v 611mm@ Patented June 19, 1923.

' UNITED STATES PATENT ori-ica GEORGE J'. ZIEGLER, QF LOS ANGELES, CALIFORNIA.

'.imcron TnANsMrssIoN.

application med January 1s, 1922. serai Nn. 1129,53?.

To all whom it may concern:

Be it known that I, GEORGE. J. Zlnonnn, a citizen of the United States, residing at Los Angeles, California, have invented a certain new and useful Tractor Transmission, of which the following is a specification.

My ob'ect is to make an improved transmission or driving and steermg a tractor, and my invention consists of the novel features herein shown, described and claimed.

Fi 1 is a side elevation of a tractor provide with a transmission embodyin the rinciples of my invention, andas indicated y the arrow 1 in Fig. 2.

Fig. 2 is a to plan view as indicated by the arrow 2 in 1.

Fig. 3 is an e arged detail plan of the transmission.

'Fi 3A is an-enlarged horizontal sectional detai on a plane parallel with Fig. 3.

Fig. 4 is a fragmentar vertical cross section on the line 4-4 of ig. 3^.

Fi 5 is a fragmentary cross section on the lme 5-5 of Fig. 3A and 6.

Fig. 6 is a fragmentary sectional detail on the lines 6-6 of Figs. 3A and 5.

Figs. 7, '8, 9, 10, 11, and 12 are diagrammatic views showing the various manlpulations and operations of driving and steering.

Fi 13 is a diagrammatic section of the sliftmg gear, and co-operating arts.

The tractor runs on the drive wheels 1 and 2 and the castor-wheel 3. The drive wheels 1 and 2 are loosely mounted on the rigid axle 4. The frame bars 5 and 6 are mounted on the axle 4 and on the castor wheel 3. The bull gears 7 and 8 are fixed to the webs 9 and 10 of the drive wheels 1 and 2 and inside of the rims 11 and 12. The bull gear pinions 13 and 14 mesh with the bull ars 7 and 8 and are fixed upon the jack sha ts 15 and 16 and the jack shafts 15 and 16 extend through bearings 17 and 18 in the frame bars 5 and 6.

The transmission case sections 19 and 20 are secured to ether on a vertical line by anges and bo ts 21. The section 22 of the drive shaft is mounted in a bearing 23 ex tending forwardly from the case and has a bevel pinion 24. inside of the case. The transmission shaft 25 is mounted in bearings 26 and 27, said bearings being mounted 1n the case horizontally'and transversely and said transmission shaft 25 being in line with the jack shafts 15 and 16. Bearings .2.8A and 29 are mounted in the ends of the shaft 25 and the ends of the jack shaftsv fit into 'the bearings to support the ends of the jack shafts. A rigi gear 30 is formed upon the inner face vof the case section 20. A hub 31 1s keyed upon the shaft 25 and a bevel'gearv 32 1s secured to the hub. A spider33- is loosely mounted upon the` center of the shaft 25 and bevel pinions 34, 35, 36, and 37 are mounted in the spider 33 in mesh with the gearl 32. A hub 38 is loosely mounted upon the shaft 25, a bevel gear 39 is fixed to the hub 38 and meshes w1th the pinion 24 and a bevel gear 40 is -xed to the hub .38 and meshes with the pinions 34, 35, 36, and 37, said pinions serving as idlers between the gears 40 and 32. A vgear 41 is formed upon the inner face of the body of the bevel gear 39. Shifting gears 42 and 43 are formed upon the sides of the rin 44 to match the gears 41 and 30 and the rmg 44 isslidingly sphned upon the s ider 33 'and has an external groove 45. yoke 46 has rollers 47 and 48 running in thegroove 45 diametricall opposite each other. A handle 49 exten s 'from the center of the yoke 46 through the case, there being a ball 50 upon the handle mounted in a ball socket 51 in the case to form a pivot for the handle, and so that when the handle 49 is straight the shift gears 42 and 43 are inA neutral positions out of mesh with the gears 41 and 30 and sothat when the handle is moved 4to the right the gear 42 meshes with the gear 41 and when the handle is moved to the lleft the gear 43 meshes with the gear 30.

When the shaft 22 is running clockwise when seen from the front and as indicated by the arrow the gear 39 will run clockwise when seen from the right relative to the rear as indicated by the arrow. If the shift gears 42 and v43 are in neutral the idlers 34, 35, 36 and 37 will travel on the gear 32 and no ower will be applied to the tractor. If l the andle 49 is moved to the right the gear 42 will mesh with the gear 41 and hold the pinions from travelling on thel gear 32 and rotation of the spider will drive the gear 32 thus driving ther tractor ahead. If the hanv dle 49 is moved to the left the ar 43 will mesh with the gear 30 and h'olethev spider and the inions will rotate in the direction indicated) by the arrow and communicate power to the gear 32 and drive the tractor backwards.

v nectedv to the crank 76 and has a head 79 Of course it is assumed in the foregoing that the tractor wheels 1 and 2 are connected and this connection is as follows: Driving clutch wheels 52 andk 53 are keyed upon the ends of the shaft 25 and have rims 54 and 55 extending outwardly. Pins '56 and 57 are fixed in the wheels, 52 and 53 parallel with the axis. A driving clutch ring 58 is lioatingly mounted onfthe ins 56 and 57. A sleeve 59 is keyed upon t e jack shaft 15 and a driven clutch member 60 vis formed integral with the inner end of the sleeve 59 and fits the inner face of the rin 58. Pins 61 are fixed in the member 60 an the movable driven clutch member 62 is floatingly mounted on the pins 61 and fits the outer face of the ring 58 so that pressure against the outer face of the member 62 clamps the ring 58 between the members 62 and 60 and connects the jackshaft 15 to the transmission shaft 25. A hub 63 is screw seated upon the sleeve 59 and held in adjusted position by a latch 64. Bearingsextend from the hub 63 and eccentric links 65 are connected to the bearings and bear against the member 62. A hub 66'is slidingly mounted upon the sleeve 59 and links 67 connect the hubv 66 to the links 65. A flange 68 is mounted upon the shaft 15 and a spring 69 fits against the flange and presses against the sliding hub 66 hard enoughto .set the clutch, so that when the spring is released the tractor wheell is connected to the transmission to be driven forwardly orwbackwardly. A

` 71 and extendsnpwardly. A push rod'77 is slidingly mounted in a bearing 78 and conyupon its inner end.

In a like manner the tractor wheel 2 is connected to be controlled by the push rod 80 mounted in thebearing 81 and having a head 82. A shaft 83 is mounted vertically and Athrough the clutches to .the transmission shaft 25. If ,the handle 84 is turned to the right one-eighth of a turn for right hand steering the right hand wheel is released, and if the handle is turned to the left oneeighthof a turn the left hand wheel is released, and if the handle is turned either lwheels behind the axle.

incensi The springs 69 tend to move the heads 79 and 82 towards each other and the cam l85 forces the heads outwardly.

The drivrs seat 86 is Ibehind the tractorwheels, the caster wheel 3 is behind the-seat and the handles 49 and 84 are within easy reach of the driver.

left and the tractor wheels are both drivenl backwardly.

ln Fig. 9, he handle 84 is moved to the right, thus releasing the right hand wheel, and the handle 49 moved to the right Aand the wheel 1 drives forwardly while no power is applied to the wheel 2 and the tractor.

turns in a circle with the wheel 2 as a center. ln Fig. 10, the handle 84 is moved Vto the left, thus releasing the left hand wheel and v the `tractor turns with the wheel 1 as ya center.

1n Fig. 11 the handle 49 is moved to the left thus reversing the transmission and the handle 84 is moved to the right to unclutch the wheel 2 and thetractor turns backwardly, while in Fig. 12 the wheel i is unclutched and becomes the pivot.

The tractorshown is short. The engine is between the front parts of the drive wheels, that is just in front of the axle, and the transmission is all betweenthe drive The tractor will turn in a circle of which the axle is more than the diameter, b driving half way around forwardly an the other half way around backwa'rdly.l

Especial attentionis called to the three transmission shafts 15, 16 and 25 mounted in a straight line, the connection betweenthe drive shaft 22 and the transmission shaft 25 whereby the transmission shaft may be neutral Aor drive forwardly-orbackwardly and the normally closed clutches connecting the shafts 15 and 16 to the shaft 25, the hanioo y dle 49 for controlling and reversingand the handle 84 for'turning. r Various changes may be made without `departing from the spirit of my invention as claimed. l

I claim:

1'. In a transmission, a transmission shaftv mounted transversely, a bevel gear' xed upon one end of the transmission` shaft', a

spiderV loosely mounted upon the center of the transmission shaft, pinions mountedv in the spider in'mesh with the bevel gear, a second bevel gear loosely mountedupon the other end of the transmissionshat in mesh with the' piniOnS, a sion we: in

shaft, means for driving the second bevel which the transmission shaft is mounted, a face gear rigid with the case, a ring slidingly splined upon the spider, a second face gear upon the ring adapted to mesh with the case gear, a third face gear upon the second bevel gear, a fourth face gear upon the ring adapted to mesh with the third face gear, a handle for operating'the ring, a drive shaft, a bevel gear upon the drive shaft in mesh with the second bevel gear, jack shafts one at each end of the transmission shaft, clutches normally connecting the jack shafts to the transmission shaft, and means for releasing either or both clutches.

2. In a transmission, a case, a transmission shaft transversely in the case, a bevel ear fixed upon one end of the shaft, a spider loosely upon the center of the shaft, a second bevel gear loosely upon the other end of the gear, pinions in the spider connecting the bevel gears, selective means for letting the spider run, or holding the s ider or driving the spider, and selective c utches for connecting the transmission shaft to drive wheels.

3. A transmission shaft, a bevel gear lixed upon the transmission shaft, a spider loosely upon the transmissionshaft, a second bevel gear loosely upon the opposite end of the transmission shaft from the first bevel gear pinions in the spider connectin the beve gears, a ring slidingly -spline upon the spider, face gears upon the ring, a rigid face gear, a face gear carried by the second bevel gear, and means for moving the ring.

Witness my hand, this 3rd day of January 1922.

GEORGE J. ZIEGLER. 

